Brent Goose vs White-backed Duck
Branta bernicla comparado con Thalassornis leuconotus
Side-by-Side Comparison
| Atributo | Brent Goose | White-backed Duck |
|---|---|---|
| Nombre científico | Branta bernicla | Thalassornis leuconotus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 63,9 cm (25.2 in) | 33,3 cm (13.1 in) |
| Peso | 1335,0 g (47.09 oz) | 704,6666666666666 g (24.86 oz) |
| Dieta | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | -- |
| Tamaño de la puesta | 1-10 | 4-10 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Brent Goose only
White-backed Duck only
Ninguno
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
White-backed Duck
Freshwater lakes, ponds, and swamps with abundant floating aquatic vegetation, especially water lilies, in sub-Saharan Africa and Madagascar. Prefers shallow sheltered water with emergent vegetation for cover.
Song & Call Comparison
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
White-backed Duck
Soft, low whistles and hissing sounds. The White-backed Duck is relatively quiet compared to whistling-ducks. Alarm call is a low 'peep'. Mostly heard at night.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
White-backed Duck
Estado de conservación
Brent Goose
White-backed Duck
How to Tell Them Apart
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
White-backed Duck
Heavily mottled and barred brown and buff overall. Diagnostic white back patch visible in flight. Head brown with whitish face and chin. Stiff tail held erect. Sexes similar; stiff-tail diving …
About These Birds
Brent Goose
El barnacla brenta o barnacla negruzca es un pequeño ganso marino de color negro y gris oscuro con un pequeño parche blanco a los lados del cuello. Cría en la tundra ártica y migra a zonas costeras templadas del hemisferio norte en invierno, donde se alimenta principalmente de zostera, un tipo de hierba marina. Es el único ganso que pasa el invierno en ambientes exclusivamente marinos.
White-backed Duck
El pato blanquinegro es un pato de cola tiesa africano con un plumaje críptico de color marrón oscuro moteado de blanco. Se distingue por su cabeza de color caqui y el cuello barreado. Habita en pantanos con vegetación densa y lagnas con abundante vegetación flotante en África subsahariana y Madagascar. Está clasificado como casi amenazado.